diff --git a/util/pl/Mingw32.pl b/util/pl/Mingw32.pl
index 84c2a22db3..681a4552ea 100644
--- a/util/pl/Mingw32.pl
+++ b/util/pl/Mingw32.pl
@@ -19,7 +19,7 @@ $cc='gcc';
 if ($debug)
 	{ $cflags="-g2 -ggdb"; }
 else
-	{ $cflags="-DL_ENDIAN -fomit-frame-pointer -O3 -m486 -Wall"; }
+	{ $cflags="-DL_ENDIAN -DWINDOWS -fomit-frame-pointer -O3 -m486 -Wall"; }
 
 $obj='.o';
 $ofile='-o ';